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-rw-r--r--src/grammar.pest2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/grammar.pest b/src/grammar.pest
index 3db5519..89d1b5a 100644
--- a/src/grammar.pest
+++ b/src/grammar.pest
@@ -6,4 +6,4 @@ definition = { symbol+ ~ "=" ~ expression }
expression = { (symbol | integer_literal | string_literal | ("(" ~ expression ~ ")"))+ }
integer_literal = @{ "-"? ~ ASCII_DIGIT+ }
string_literal = { QUOTATION_MARK ~ (!QUOTATION_MARK ~ ANY)* ~ QUOTATION_MARK }
-symbol = @{ (ASCII_ALPHA | "_.") ~ (ASCII_ALPHANUMERIC | "-" | "." | "?" | "!")* }
+symbol = @{ (ASCII_ALPHA | "_") ~ (ASCII_ALPHANUMERIC | "-" | "." | "?" | "!")* }